This page contains the source code and a hardware interface example for the programming of the Atmel AVR family of microcontrollers. These programs were inteded for use under Linux, but also a preliminary windows port via Cygwin is under way.

Download: avrprg.tgz

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Last changes (Changelog.txt)
Supported chips:

• AT90S2313
• AT90S1200 (untested)
• ATTiny2313
• ATTiny24
• ATTiny44 (untested)
  
• ATTiny84 (untested)
  
• ATMega8
• ATMega16 (untested)
• ATMega32
  
• ATMega48
• ATMega88
  
• ATMega168 (untested)

   Adding new chips:

// Chip specific definitions:
// int id;              -> The 3 signature bytes of the chip
// int flash_size;      -> The size of the flash memory (bytes)
// int eeprom_size;     -> The size of the EEPROM memory (bytes)
// int page_size;       -> The size of a Flash page (words)
//                         0 means no pages at all (older chips)
// char p0;             -> The value read during flash programming while busy
// char p1;             -> The value read during EEPROM erase while busy
// char p2;             -> The value read during EEPROM programming while busy
//                         0x1 means to use POLL/RDY command
// char fuses;          -> Fuse mask bits:
//                         0:fuses, 1:fusesh, 2:fusesEX, 3:lock
// char *name;          -> A name for the chip

const chip_id idt[]={
    0xfffffe,    0,   0, 0,0xff,0xff,0xff,0,"NONE",
    // Old small chips
    0x1e9101, 2048, 128, 0,0x7f,0x80,0x7f,0,"AT90S2313",
    0x1e9001, 1024,  64, 0,0xff,0x00,0xff,0,"AT90S1200",
    // Old Mega chips
    0x1e9307, 8192, 512,32,0xff,0xff,0xff,0x0b,"ATMEGA8",
    0x1e9403,16384, 512,64,0xff,0xff,0xff,0x0b,"ATMEGA16",
    0x1e9502,32768,1024,64,0xff,0xff,0xff,0x0b,"ATMEGA32",
    // New small chips
    0x1e910A, 2048, 128,16,0x01,0x01,0x01,0x0f,"ATtiny2313",
    // New mega chips
    0x1e9205, 4096, 256,32,0x01,0x01,0x01,0x0f,"ATMega48",
    0x1e939a, 8192, 512,32,0x01,0x01,0x01,0x0f,"ATMega88",
    0x1e9406,16384, 512,64,0x01,0x01,0x01,0x0f,"ATMega168",
    // Tiny24/44/84
    0x1e910B, 2048, 128,16,0x01,0x01,0x01,0x0f,"ATtiny24",
    0x1e9107, 4096, 256,32,0x01,0x01,0x01,0x0f,"ATtiny44",
    0x1e910C, 8192, 512,32,0x01,0x01,0x01,0x0f,"ATtiny84",

    // Table terminator
    0,0,0,0,0,0,0,0,NULL
};

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Supported Hardware interfaces:

• Serial port interface (basic schematic)  
  
• (programming prototype for AT90S2313, ATTiny2313 and AT90S1200)
• (ISP emulator for AT90S2313, ATTiny2313 and AT90S1200  [spanish])
  
• Lots of parallel port interfaces are supported. See for instance: LPT_schematic
  

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The programs:

avrprg:

This program uses a graphical interface built around the XForms library. Here are some snapshots:

• Main window
• Fuses window
• Hardware test window
  

avrpcmd:

This is a command-line only program. A port to Windows based on the Cygwin enviroment is possible. This program is much more suited for its use in scripts and makefiles.

Help dump:

$avrpcmd
Usage avrpcmd [options/commands]
== Options:
-dev <dev>     : Use the <dev> device for programmer
-fmt <format>  : Specify output data format: (ihex,srec,bin)
-v             : Verbose log
== Commands:
-id            : Only print the chip ID and exit
-rdf <file>    : Read Flash memory to <file>
-rde <file>    : Read EEPROM memory to <file>
-blk           : Check if Flash memory is Blank
-ver <file>    : Compare Flash memory content to <file> (Verify)
-wrf <file>    : Write <file> to Flash memory
-wre <file>    : Write <file> to EEPROM memory
-erase         : Erase chip
-rdfuses       : Read FUSES byte
-rdfusesh      : Read FUSES High byte
-rdfusesx      : Read FUSES Extended byte
-rdlock        : Read LOCK byte
-rdcal <n>     : Read Calibration value <n> for internal Osc.
== Fuse values are binary (e.g. 11100100) or hex. (e.g. 0xE4)==
-wrfuses <val> : Write FUSES byte with <val>
-wrfusesh <val>: Write FUSES High byte with <val>
-wrfusesx <val>: Write FUSES Extended byte with <val>
-wrlock <val>  : Write LOCK byte with <val>

Usage dump (reading an internal oscillator calibration value):

$avrpcmd -v -rdcal 1

----- Calibrating delay ...
> 260 loops per us interval
----- Reading Parallel Port Configuration (parallel.cfg)...
VCC:    0x04
RESET:  0x10 Inv.
SCK:    0x20 Inv.
MOSI:   0x40 Inv.
MISO:   0x80
----- Opening Parallel Port...
----- IO Base: 0x378
----- Identifying Device...
<> Device_ID = 0x1E910A
<> device found: ATtiny2313
Chip: ATtiny2313
  Signature: 1E910A
  Flash:  2048 bytes
  EEPROM: 128 bytes
>>>>> Calibration value #1 : 79 (0x4F)
OK